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首页> 外文期刊>Journal of Neuroimmunology: Official Bulletin of the Research Committee on Neuroimmunology of the World Federation of Neurology >Peripheral blood lymphocytes muscarinic cholinergic receptor subtypes in Alzheimer's disease: a marker of cholinergic dysfunction?
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Peripheral blood lymphocytes muscarinic cholinergic receptor subtypes in Alzheimer's disease: a marker of cholinergic dysfunction?

机译:阿尔茨海默氏病中外周血淋巴细胞毒蕈碱型胆碱能受体亚型:胆碱能功能障碍的标志?

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摘要

Muscarinic M2-M5 muscarinic cholinergic receptors were investigated in peripheral blood lymphocytes of patients with mild cognitive impairment of the Alzheimer's type (MCIAT), probable Alzheimer's disease (AD) and probable vascular dementia (VaD). [3H]-N-methyl scopolamine (NMS) in the presence of muscarinic antagonists and Mamba venom to occlude different receptor subtypes was used as radioligand. Analysis of [3H]-NMS binding curves without receptor subtype assessment resulted in a slight decrease of receptor density in AD patients. Evaluation of receptor subtypes in MCIAT and AD patients revealed a decrease of M3 receptor by more than 50%, an increase of M4 receptor expression by about 20% and no changes of M2 or M5 receptors. The expression of M2-M5 receptors was unaltered in VaD patients. Strong positive and negative correlations respectively were found between the density of lymphocyte M3 and M4 receptors and MMSE score in both MCIAT (0.78 for M3 receptor and 0.80 for M4 receptor) and AD (0.82 for M3 receptor and 0.83 for M4 receptor) patients. These findings suggest that changes in the expression of peripheral blood lymphocyte M3 and M4 receptors in AD are related to the degree of cognitive impairment. Assessment of lymphocyte muscarinic receptor subtypes may contribute to characterization of cholinergic impairment in AD.
机译:在患有轻度认知障碍的阿尔茨海默氏型(MCIAT),可能的阿尔茨海默氏病(AD)和可能的血管性痴呆(VaD)的患者的外周血淋巴细胞中研究了毒蕈碱M2-M5毒蕈碱胆碱能受体。 [3H] -N-甲基东pol碱(NMS)在毒蕈碱拮抗剂和Mamba毒液存在下,以封闭不同的受体亚型,被用作放射性配体。未经受体亚型评估的[3H] -NMS结合曲线分析导致AD患者的受体密度略有下降。对MCIAT和AD患者的受体亚型的评估显示,M3受体减少超过50%,M4受体表达增加约20%,M2或M5受体无变化。 VaD患者中M2-M5受体的表达未改变。 MCIAT(M3受体为0.78,M4受体为0.80)和AD(M3受体为0.82,M4受体为0.83)患者的M3和M4受体密度与MMSE评分之间分别存在强正相关和负相关。这些发现表明AD中外周血淋巴细胞M3和M4受体表达的变化与认知障碍的程度有关。淋巴细胞毒蕈碱受体亚型的评估可能有助于AD胆碱能损伤的表征。

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